If there was a master list for signature runners to check, it would cut a ton of spam. Sold accounts would also lose value if they where kicked from a campaign. Mention that because a lot of the spam is from guys with ten plus accounts.
They just need to read the post history to know someone is posting the same thing over and over again or just generally bad. The last few pages should be enough.
Yobit is automatic and I find most kicked from this campaign end up in one of two other campaigns that do no background check. Bitmixer was one and the other one has a small signature that I always forget. Just think if there was a list they could run through each day for new members and flag those that where booted from another campaign. It would allow campaign managers to really narrow their field of work on top of the current scripts that check members post quality.
It would mean that the lazy managers can stay lazy while others do the work for them.
Number one question coming from new accounts tends to be where can I get signature and then they are off to the races asking questions that have been asked a million times.
Making it harder to jump from campaign to campaign would kill the spam and its well known that accounts post well for 20-40 posts before joining a new campaign that may look at quality. Twigged to this after clicking on yobits monthly "theres the door" list and sudden improvement from guys that posted no more than 3-8 word responses.
Campaign managers doing their job from the start would also kill spam. Dont accept newbies, they have no post history. Everyone else gets a history check before getting accepted. Repeatedly check again with each payment. This is pretty common with most campaigns, its just a few that dont bother or dont care enough.